The more I read, the more I acquire, the more certain I am that I know nothing.

Self love is the instrument of our preservation.

My life's dream has been a perpetual nightmare.

"I have no more than twenty acres of ground," he replied, "the whole of which I cultivate myself with the help of my children; and our labor keeps off from us the three great evils - boredom, vice, and want."

I believe that there never was a creator of a philosophical system who did not confess at the end of his life that he had wasted his time. It must be admitted that the inventors of the mechanical arts have been much more useful to men that the inventors of syllogisms. He who imagined a ship towers considerably above him who imagined innate ideas.

It is not sufficient to see and to know the beauty of a work. We must feel and be affected by it.

In every author let us distinguish the man from his works.